More images saved from various trawls around the web, above: Images for Learning (Science Research Associates Inc.) 1971, found on eBay.

From Andrew Sclanders’ Beat Books list: A large postcard with designs by Gompers Saijo publicising the benefit held for the Zen Mountain Center at the Fillmore, San Francisco, March 15, 1967. 
22.5×14.7cm.

Apple Boutique ‘Upon Our Way’ poster by The Fool, 39.5cm x 57cm, 1967/68.

Upscaled repro Pink Floyd poster, 1967.

International Times graphic, 1968. Thanks to Neil Rice for pointing this out. From Hoppyx.com